Reconciliation of The Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)	12 Months Ended
	Jan. 01, 2021	Jan. 03, 2020
Schedule Of Unrecognized Tax Benefits [Abstract]
Balance	$ 1,923,000	$ 1,748,000
Additions based on tax positions related to the current year	275,000	515,000
Reductions due to lapse of statute of limitations	(325,000)	(340,000)
Balance	$ 1,873,000	$ 1,923,000